/Engine/Source/Runtime/JsonUtilities/Public/JsonObjectConverter.h
static const [CustomExportCallback](API\Runtime\JsonUtilities\FJsonObjectConverter\CustomExportCallback) ExportCallback_WriteISO8601Dates = FJsonObjectConverter::CustomExportCallback::CreateLambda( [](FProperty* Prop, const void* Data) -> TSharedPtr<FJsonValue> { if (FStructProperty* StructProperty = CastField<FStructProperty>(Prop)) { { if((!!( !( StructProperty->Struct ) ))) { if (FDebug::CheckVerifyFailedImpl("StructProperty->Struct", __FILE__, __LINE__, PLATFORM_RETURN_ADDRESS(), TEXT(""))) { PLATFORM_BREAK(); } ; } }; if (StructProperty->Struct->GetFName() == NAME_DateTime) { return MakeShared<FJsonValueString>(static_cast<const FDateTime*>(Data)->ToIso8601()); } } return {}; });